[RELEASE] Released version 1.4.6

Released version 1.4.6 with the following main changes :
    - [BUILD] ebtree: update to v6.0.1 to remove references to dprintf()
    - [CLEANUP] acl: make use of eb_is_empty() instead of open coding the tree's emptiness test
    - [MINOR] acl: add srv_is_up() to check that a specific server is up or not
    - [DOC] add a few precisions about the use of RDP cookies
diff --git a/VERSION b/VERSION
index e516bb9..c514bd8 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.4.5
+1.4.6